Hmmmmm depends what zelda you are doing but here's some of my quick inputs.

On these pictures which look more similar to your cosplay I noticed that the belt is actually attached to the tunic. It's an easy fix if you have more of that green fabric. Also I noticed that the buckle on the belt seems of and he has different buckles on his shoes.

But other than that this is beautiful!!! I love your shield too. And no one will care about your hair color ;D I promise.